Fix feature path catch blocks

src/components/admin/MarkdownEditor.tsx

@@ -154,7 +154,7 @@ export function MarkdownEditor({
                   if (!imageUrl) throw new Error('Failed to generate image URL');
                   
                   return imageUrl;
-                } catch (error) {
+                } catch (error: unknown) {
                   console.error('Image upload failed:', error);
                   throw new Error(error instanceof Error ? error.message : 'Failed to upload image');
                 }